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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '880a3b8dc432bd3c335d2c2606e217867b8a27c3b8d215d7fd52e6032ea631c0' 
  AND token = 'ntdLto9Mt76vZy5BY40RHDpwvyJKB1lcMT2tuUE3Y5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}